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3 S N I H O T U H L nu LOCKING DEVIGES POR THE HARNESS JAGKS OP LOOMS.

Patented July 27, 1886.

Wmmw Ql (No Model.) 3 Sheets-Sheet 2.

G. F. HUTCHINS.

LOCKING DEVICES FOR THE HARNESS JAGKS OF LOOMS.

N0. 346,407. Patented July 27, 1886.

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Wzwfw (No Model.) 3 Sheets-Sheet 3. G. I'. HUTCHINS.

LOCKING DEVICES FOR THB HARNESS JAGKS 0F LOOMS. No. 346,407. Patented July 27, 1886.

N jdr l I N. PETERS. PhalvLixhagmpner. wnhingmn, n, c.

NiTnD STATES PATENT Fries,

GEORGE F. HUTOHINS, OF VOROESTER, MASSACHUSETTS, ASSIGNOR TO THE KNOVLES LOOM VORKS, OF SAME PLACE.

LOCKING DEVICE FOR THE HARNESS-JACKS OF LOOMS.

SPECIFICATION lforming part of Letters Patent No. 346,407, dated July 27, 1886.

A pplieation filed May Q3, 1885. Serial No. 166.52l. (No model.)

'.7'0 all whom it may; concern.'

Be it known that I, Gnonon F. IIUTcHrNs, a citizen of the United States, residing at Ilforcester, in the county of lVoreester and State 5 of Massachusetts, have invented certain new and useful Improvements in Locking Devices for the Harness-Jacks of Looms, of which the following is a full, clear, and exact description, and which, in connection with the drawro ings making a part of this specification, will enable others skilled in the art to which my invention belongs to make and use the same. My invention relates to looms; and it consists in an improved automatic locking device or attachment for the harness-jacks, adapted to be applied to looms for the purpose of relieving the strain on the mechanism for operating the harness proper, by causing the harness-jacks to be carried over a little far- 2o ther in either direction than they otherwise would be, and holding or locking them firmly in such position, thus allowing the harness mechanism which operates the jacks to act freely and quickly, the great strain usually brought to bear upon said mechanism by the great weight of the harness being, by means of my invention, relieved and temporarily removed at just the time the harness mechanism should be free to act in a proper manner.

3o I have shown in the drawings only such parts of a loom as will be necessary to clearly illustrate the construction and operation of my improved harnessjack-locking attachment applied thereto, and I make no claim to any part of said loom as my invention, except the `jacleloeking attachment, to be hereinafter fully described.

Referring to the drawings, Figure l represents a rear view of a loom, some of the parts :,0 of which are left off in order to more clearly show my invention. Fig. 2 represents an end view of the loom upon which the harness mechanism is mounted, looking in the direction of arrow, Fig. l. Fig. 3 represents, on

an enlarged scale, a side view of a portion of the loom shown in Fig. l, all the parts being left off except the locking device and a harness-j ack, which is shown locked in the position which it is in when the harness attached to it is 5o up. Fig. 4 is a similar View to Fig. 3, except that the harness-jack is shown locked in the position which it is in when the harness is drawn down; and Fig. 5 is a detached side view ofthe locking-rod and cam for operating the same removed from the loom proper, as 5 5 will be hereinafter fully explained.

As many parts of the loom shown in the dra-wings are similar to those for which Letters Patent have heretofore been granted, and which patented looms are well known to the 6o public, a detailed description ot' the loom shown is unnecessary, and I shall confine myself, principally, to a description of my improvement and the features thereof which I wish to secure by Letters Patent. 6:

Similar letters of reference refer to similar parts in the drawings.

In the accompanying drawings, the parts marked A are the loom sides or frame.

a is the loom-arch.

b is the head.

B is a harnessframe in its lower position, and B represents the harness-frame in its upper position.

O O are the wires and straps connecting the harness-frame with the jack in the usual manner.

D is one of the anglelevers or harnessjacks (to raise and lower the harness) pivoted on the jack-pin e, secured in the frame'of the loom S3 inthe usual manner. When the harness is raised, the jack D is in substantially the position shown by dotted lines, Fig. l, and when it is lowered in the position shown by full lines, Fig. l.

The parts of the mechanism shown in the drawings for operating the harnesses and the pattern-chain are old and well known,and form no part of my present invention. I therefore will not describe them, but simply state that 9o r i' are the upper and lower cylinder-gears;

k k, their shafts. s is a vibrator-gear. t is a vibrator. u is the heel-pin on which each vibrat-or swings. o e are the arms which support the vibrators and pattern-chain. w is the pattern-chain shaft. a' is the pattern-chain. y is the hook connecting the vibrator-gear with the jack D, and E is the shaft which gives motion to the harness mechanism. All

of these parts are constructed and operated in roo the usual manner.

I will now proceed to describe the harnessjack-locking device and the mode of operation of the same, as shown in the drawings and :more fully illustrated in Figs. 3, 4, and 5 thereof.

lIhe angle-levers or harness-jacks D are each provided with a projection or locking-horn, d, by means of which the jacks are held by my locking device, which consists of the lockingrod f, which extends through an opening 0n each side of the loom-arch a, at substantially right angles thereto, and is secured at each end to adj usting-pieces j, which are provided with slots, (see Fig. 5,) and may be adj usted on the supporting-arms g' g by means of screws h 7L. The arms g g are secured upon a shaft, n, turning in suitable bearings in the frame ol" the loom, said shaft a being substantially parallel t0 the locking-rodf. (See Fig. 5.) Upon one end of the shafta is secured the arm g, projecting out therefrom, and provided at its outer end with a small roll, l, which turns on a stud, m, which is made adjustable up and down in a slot in the end of said arm g. A coiled spring, o, is secured at one end to a hook, q, which passes through a lug on the loom-arch a, and at the other end to the projection p, extending out from the piece j. Said spring (in connection with a second similar spring, not shown in the drawings, connected to the other end of the locking-rod f or its supporting-arm) serves to pull the supporting or locking arms g and rod f down to lock or hold the jacks as soon as the horns or projections d have passed the locking-rod f.` The lockingrod j" is operated by means of a cam, i, secured upon the shaft 7c of the lower cylindergear r. The roll Z on the end of the arm g bears against the cam t', so that as the cam revolves with the shaft kit raises the locking-rod 4o f by depressing the arm gand allows the jacks D to be changed between the positions shown by the full lines c c and dotted lines cc, Fig. l, and the positions shown in Figs. 3 and 4. At each revolution of the cam i the locking` rodf is raised to allow the jacks D to change their positions, as indicated by the patternchain, in the usual manner, and as soon as the harness mechanism has operated the jacks or changed their positions, then the rod f is forced or drawn down by the springo at each end thereof, and said rod working on the inclined surface of the projections d, either the upper or the lower side thereof, according to the position of thejacks, forces thejacks alittle farther over in either direction, according as they have the projections el above or below the rodf, a sufficient distance to relieve the strain and friction on the harness-operating` mechanism, consisting of the Vibrator-arm t, vibrator-gear s,and the hook 1 ,connecting the if'ibrator-gear with the jack D, all ofthe usual construction and operation, which strain and friction is caused by the great weight of the harnesses secured to the jacks D. rlhe strain on the harness mechanism being removed, as above described, it is allowed to be moved easily by the balls on the pattern-chain,so as to enable the vibrator-gear sto be readily carried into contact with the top cylinder-gear r or to drop by gravity freely and quickly into contact with the lower cylinder-gear r. Vhile the harness motion or-mechanism is changing its position,as indicated by the pattern-chain, and as above described, the locking-rod f remains in its position, locking and holding the jacks D,until at the proper time for their positions to be changed,when the cam t' raises the rod f, and the-operation above described is repeated.

I have shown in the drawings one way of operating the locking-rodf by means of the cam i, as hereinbefore explained; but l do not wish to limit myself tothis way, i'or the locking-rodj' might be operated inother different and equivalent ways. For instance,the arm g might be attached directly to either of the supporting-arms g', and extended up so as to be operated by a cam upon the shaft 7c of the upper gear-cylinder r, or by a eamsurface made on the cylinder r itself.

Having described my improved locking device for harness-jacks of looms, what I claim therein as new and of myinvention, and desire to secure by Letters Patent, is

The combination,with thelocking-rodjadj ustable up or down on its supporting-arms, and means for adjusting and holding said rod, substantially as shown, spring o, secured at one end to the frame of the loom, for the purpose stated, and the frame of the loom, the shaft a, and the supporting-arms g, secured thereon, of the arm g, secured upon said shaft n, and the shaft k and cani i, secured thereon, for the purpose stated, substantially as set forth.

GEORGE F. HUTCHINS.

Vitnesses:

FRED. W. SMITH, JOHN G. DEWEY. 

